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Load bearing assembly comprising a steel rope and a jacket

a technology of load bearings and steel ropes, which is applied in the direction of elevators, transportation and packaging, coatings, etc., can solve problems such as undesirable consequences, and achieve the effect of avoiding excessive friction

Inactive Publication Date: 2014-10-09
BEKAERT ADVANCED CORDS AALTER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a load bearing assembly for elevators that avoids the drawbacks of prior art. The assembly has a high coefficient of friction to ensure proper traction between the assembly and other components, such as sheaves. The high molecular weight of the particles used in the assembly prevents them from being excessively frictional during the coating process. Additionally, using larger lay lengths and increasing gaps between components can also improve the assembly's performance.

Problems solved by technology

During use the elastomeric coating material undergoes large deformations which may result in cracks, particularly when the use of small diameter sheaves causes frequent high bending stresses in the coating material.
However, excessive friction can lead to undesirable consequences when the counterweight gets stuck during elevator operation.

Method used

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  • Load bearing assembly comprising a steel rope and a jacket
  • Load bearing assembly comprising a steel rope and a jacket
  • Load bearing assembly comprising a steel rope and a jacket

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Embodiment Construction

[0064]The present invention will be described with respect to particular embodiments and with reference to certain drawings but the invention is not limited thereto but only by the claims. The drawings described are only schematic and are non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes. The dimensions and the relative dimensions do not correspond to actual reductions to practice of the invention.

[0065]FIG. 1 schematically represents a load bearing assembly 100 suitable for use in an elevator system. The load bearing assembly 100 comprises a steel rope 102 and a jacket 110. The steel rope 102 comprises for example a cord of the type 7×7+7×19W. The following rope formula describes the rope construction: ((0.34+6×0.31)+6×(0.25+6×0.25))+7×(0.34+6×0.31+6×0.33 / 0.25).

[0066]The steel rope 102 comprises a 7×7 core strand 104 and 7 Warrington type outer strands 106 comprising 19 filaments. The Warrington type ...

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Abstract

A load bearing assembly (100) for use in elevator system wherein the load bearing assembly (100) comprises at least one steel rope (102) and a jacket (110) surrounding this at least one steel rope (102). The jacket (110) comprises at least one layer of a thermoplastic elastomer comprising polymer particles (112). The polymer particles (112) have a molecular weight higher than 0.5*106 g / mol. The jacket (110) provides a coefficient of friction allowing sufficient traction between the load bearing assembly (100) and other components of the elevator system, such as the sheaves. Also disclosed is a corresponding method of making a load bearing member.

Description

TECHNICAL FIELD[0001]The invention relates to a load bearing assembly for use in elevator systems. More particularly, the invention relates to a load bearing assembly comprising at least one steel rope comprising steel filaments. The at least one steel rope is surrounded by a jacket having a matrix of a thermoplastic elastomer with dispersed in this matrix small polymer particles having a high molecular weight.BACKGROUND ART[0002]Elevator systems typically comprise a car and a counterweight that move within a hoist way. A load bearing assembly typically moves over a number of sheaves and supports the load of the cab and the counterweight. Typical load bearing assemblies comprise belts or ropes.[0003]The diameter of the sheaves has a large influence on the lifetime of the load bearing assembly. Conventionally, sheave diameters D of at least 40 times the diameter of the load baring assembly d have been used to prevent premature failures.[0004]On the other hand, elevator systems with s...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B66B7/06D07B1/16D07B5/00
CPCB66B7/06D07B1/162D07B5/00B66B7/062D07B1/22D07B2205/2003D07B2205/2014D07B2205/2017D07B2205/2064D07B2205/2082D07B2205/3017D07B2205/3028D07B2205/3053D07B2205/306D07B2205/3071D07B2205/3085D07B2205/3089D07B2501/2007D07B5/006D07B2201/2087D07B2201/2092Y10T428/294D07B2801/22D07B2801/10D07B2801/18B32B2264/0257B32B25/02B32B5/16B32B15/06B32B2274/00B32B2264/02
Inventor GALLENS, JEROENCLAUWS, RAFKLUST, ANDREAS
Owner BEKAERT ADVANCED CORDS AALTER NV
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